Furnace construction.



J.E.J0HNSON, JR. FURNACE CUNSTRUCTION. -APPLICATION FILED AUG.27| 191 4.

Patented Feb. 27,1917.

2 SHEETS-SHEET I.

- I 11 van tor:

J. E. JOHNSON, JR. FURNACE CONSTRUCTION.

APPLICATION FILED Aus.27. 1914.

2 SHEETS -SHEET 2- Patented Feb. 27, 1917.

mr NON-IS PL'YERS C0 PHO'NLLITNOH wAsNIMJmN. n C.

JOSEPH E. JOHNSON, JR, on NEW YORK, N. Y.

summon CONSTRUCTION."

Specification of Letters Patent. P t nt d Feb. 27, 1917.

Application filed August 27, 1914. Seriallfo. 858,826.

To all whom it may concern-.1

Be it known that I, 'JosEPH E. JOHNSON, J12, a citizen ofv the UnitedStates, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Furnace Construction, of which the following is a specification, reference being had therein to the accompanying drawing.

ThlS inventlon relates to furnace construction, and has reference more particularly to blast furnaces, the object of theinvention being to so support the furnace by means of supporting columns, that the latter may be disposed at such distance from the furnace that ample room will be afforded the workmen at the base of the furnace in the performance of their duties in operating the same and making repairs; that' the danger of injury to the columns. by molten metal in the event of break outs will be reduced to a minimum; and that various ob jections encountered in practice in the oper ation, and maintenance of furnaces where the supporting columns are set close to the body of the furnace. as is the common practice, will be eliminated.

' With these and other objects in view, my

7 invention consists in so supporting the furnace on an exterlor horizontal supporting,

frame, which in turn is supported by columns, that the latter may be disposed at a considerable distance from the furnace body, whereby ample unobstructed space will be left between the columns and-furnace for the attainment of'the objects and advantages above mentioned.

In the more specific embodiment of the invention, the exterior supporting frame is of polygonal form, and gives support to the furnace through the medium of, outwardly extending supporting brackets attached to the body of the furnace at intervals there...

around and resting on the supporting frame, which latter 'issustained by vertical columns rising from the ground and giving I support to the frame at the corners of the same. The supporting brackets preferably cooperate with cantaliver brackets, whichv are so arranged as to give support to the mantle ring of the furnace at a point below the support afforded by the main brackets; whereby deflection of the mantle ring due to the weight. of the furnace lining, will be prevented. 7

In the accompanying drawings:

Figure 1 is a sectional elevation of the lower portion of a. blast furnace having my inventionv embodied therein, the section being taken on the line aa of Fig. 2.

Fig. 2 is a horizontal sectional plan view on the line Z)b of Fig. 1.-

Fig. 3 is a vertical sectional elevation on an enlarged scale ofone of the brackets by which the furnace is supported on the supporting frame, and the associated cantaliver bracket for supporting the mantle ring.

Fig. 4 is a horizontal sectional view on the line C- c. of Fig. 8.

Fig. 5 is a similar view on the line cZ-(Z .of Fig- 3.

a horizontal supporting frame exterior of the furnace, and consisting in the present instance of four flanged girders 4 connected rigidly together at; their ends into a single unitary rectangular structure, and forming in: effect a polygonal four-sided massive frame. This frame surrounds the furnace atsuch height that its lower side will be on. a level'with the mantle plate 3, the purpose ;of which will presently appear, and

the frame is supported at its four corners byv vertical columns 6, rising from the ground level. The furnace body is supportedon the frame 4 by means of supporting members 7, in the present instance eight in number, which are attached to the shell 2 at intervals therearound and rest on the upper side of the frame, it being understood that the shell supports and receives the weightlof the brickwork or masonry of the furnacethrough the medium of the mantle plate firmly connected with the shell. Each of these supporting members is in the form of a bracket plate 7 having, a horizontal lower edge, a vertical inner edge and an upwardly and inwardly inclined outer edge. Riveted or otherwise secured to the opposite sides of. the inner edge of the bracket plate, are angle bars 7, the circumferentially extending flanges of which are riveted to the shell 2; and riveted to the opposite sides of the lower edge of the bracket plate are angle bars 7", the outwardly extending flanges of which seat loosely upon the upper side of the frame 4:, while riveted to the opposite sides of the outer edge of the bracket plate are angle bars 7. This construction produces a stiff and rigid supporting bracket, and the several brackets are firmly attached to the furnace shell, and extend outwardly therefrom at intervals, with their lower horizontal portions resting on the upper side of the frame 4t at opposite sides of the frame corners, by which means the furnace is given firm support by the frame at points above the mantle. In order that the mantle plate will be given support and be prevented from deflecting under the weight of the furnace lining above, I associate with each bracket 7?, a cantaliver bracket 9, shown more particularly in Fig. 3. This cantaliver bracket is in the form of a vertical plate 9 having its inner end extended beneath the mantle plate, whence it extends outwardly beyond the body of the furnace beneath the supporting frame 4i. The outer end of the plate is connected with the outer end of the bracket plate above, by means of a vertical compression. member 10, in the form of two vertical angle bars riveted at their lower ends to the opposite sides of the bracket plate 9 at its outer end, and riveted at their upper ends to the opposite sides of the bracket plate 7 at its outer end. Between its ends and inward of the point where the bracket plate 9 bears against the supporting frame, the plate is connected with the bracket plate 7 by means of the two angle bars 7 before alluded to, which are extended downwardly and are riveted at their lower ends to the opposite sides of the plate 9, these two angle bars forming in effect a tension member. As result of the construction described, the mantle ring will be given support at intervals by the cantaliver'bracket plates, and in receiving the pressure and strains due to the weight of the furnace lining, the outer member 10 will act in compression and the inner vertical member in tension; whereby the furnace will be given effectual support by the frame t without danger of failure.

The supporting members 7 rest loosely on the supporting frame and are disconnected therefrom, and the cantaliver brackets are likewise disconnected from the supporting frame so that in the event of the furnace shell giving away and moving outwardly at the points where the supporting members are connected to it, these members may shift relatively to the simporting frame and will not bend or strain the girder flanges, as would otherwise happen if the supporting brackets were riveted thereto. In order that the mantle plate may be given support points between the support afforded by the cantaliver brackets, and in order that these brackets may be prevented from buckling, I propose to connect them together by connecting bracing members in the form of girders 11 (see Fig. 2) which girders are riveted each at its opposite ends to adjacent cantaiiver brackets, and which girders form in effect an octagonal ring, so disposed relatively to the mantle ring that the latter will be supported at points between the brackets.

As a result of the construction described, the furnace is supported by the supporting frame at points above the mantle by means of the bracket member 7 and it is also supported inwardly of these supports and below the same by the cantaliver brackets 9, the inner ends of which give direct support to the mantle ring. By reason of the disposition of the supporting frame above the mantle of the furnace, and by reason of the polygonal form of the frame, the corners of the same will be disposed a considerable distance from the furnace at its enlarged zone, and therefore the supporting columns, which are arranged beneath the corners of the frame, will be disposed at a greater distance from the relatively reduced zone beneath, constituting the bosh and hearth of the furnace. This arrangement gives ample, free, unobstructed space entirely surrounding the base of the furnace between the same and the columns, and it avoids the many objections attendant upon the disposition of the supporting columns in cases, for instance where, as is universally the custom, the columns give direct support to the mantle plate. As a result, the workmen are af- "orded free access to all parts of the furnace at the base in operating the furnace and making repairs, and by reason of the fact that the column foundations are distantly separated from the foundation of the furnace hearth, there will be no danger of the expansion of the hearth forcing the columns out of position, the soft dirt between the two preventing this action. Furthermore, in the event of break-outs, there will be no danger of the molten metal embedding the columns or injuring the same. Various other advantages, unnecessary here to enumerate, are se cured by the outward disposition of the columns described.

Fig. 6 shows a modified form of the supporting frame. In this instance, the frame is hollow in cross-section consisting of the four connected walls 45 so as to form a closed chamber or channel extending continuously throughout the same, in which the cooling water for the twyers or other purposes may be circulated.

It is preferable to employ a frame with four sides as shown in Fig. 1, because in the event of the failure of one of the supporting columns, the remaining columns will give sufficient support to the furnace to prevent collapse. Manifestly the frame may be constructed of five sides or more, which will likewise avoid danger of collapse in case of the failure of one or more of the columns.

In the foregoing description and in the accompanying drawings I have disclosed my invention in the forms and details of construction which I prefer to adopt, but it will be manifest that these details may be Variously changed and modified without departing from the spirit of my invention. Further, it will be understood that the invention is not limited to any particular form or construction of the parts, except in so far as such limitations are set forth in the claims.

Having thus described my invention, what I claim is:

1. In a furnace, the combination with an external shell and a mantle plate supported thereby, of a supporting frame exterior of the mantle plate, means whereby the shell is supported by said frame at points radially outside the mantle plate and independently thereof, and columns supporting the frame.

2. In combination with a furnace having an external shell through which its Weight is supported, a supporting frame exterior of the same, outwardly projecting supporting members fixedly attached to the furnace inwardly of the supporting frame, said members being sustained from beneath by said shell, and columns supporting the frame.

3. In combination with a furnace having an external shell through which its weight is supported, a supporting frame exterior of the same, supporting members connected fixedly with said shell inward of the supporting frame at intervals therearound and sustained from beneath by the supporting frame, and columns supporting the frame.

l. In combination with a furnace having an external shell through which its weight is supported, a supporting frame exterior of the same, supporting members connected fixedly with the shell inwardly of the supporting frame and sustained from beneath by the frame, and columns giving support to the frame.

5. In combination with a furnace having an external shell through which its weight is supported, a supporting frame exterior of the same, outwardly extending supporting brackets secured to said shell and sustained from beneath by the frame, and columns supporting the frame.

6. In combination with a furnace having an external shell through which its weight is supported, a supporting frame exterior of the same and comprising frame members disposed at angular relations to each other and connected together at their ends, supporting members connected fixedly with said shell inwardly of the supporting frame and sustained from beneath by said frame, and columns supporting the frame at the connected ends of the frame members.

7. In combination with a furnace, a supporting frame exterior of the same, means whereby the furnace is supported at different points vertically and at different radial points horizontally by said frame, and columns giving support to the frame.

8. In combination with a furnace, a continuous unitary supporting frame surrounding the same, means for supporting the furnace by said frame respectively at upper and lower points in the height of the furnace, the upper points of support being outward of the lower points of support, and columns supporting said frame.

9. In combination with a furnace, a continuous unitary supporting frame surrounding the same, supporting members connected at intervals with the furnace and extending. outwardly therefrom and sustained by the frame, additional supporting members connected with the first mentioned members and extending inwardly and giving support to the furnace at intervals at a different level from the outwardly extending supporting members, and columns sustaining said supporting frame;

10. In combination with a furnace, a supporting frame exterior of the same, outwardly extending brackets connected with the furnace and sustained by the frame, inwardly extending brackets connected with the first mentioned brackets and giving support to the furnace at a point below the first mentioned brackets, and columns supporting said frame.

11. In combination with a furnace, a. supporting frame exterior of the same, cantaliver supports carried by the furnace and disconnected from and supported by the frame, and columns supporting the frame.

12. In combination with a furnace, a sup porting frame therefor, outwardly extending brackets fixed to the furnace and sustained from beneath by the frame, brackets giving support to the furnace at points below the outwardly extending brackets, and compression and tension members connecting said brackets respectively.

13. In combination with a furnace, a supporting frame exterior of the same, outwardly extending brackets connected with the furnace and sustained by the supporting frame, brackets having their inner ends in position to support the furnace at a point below the first mentioned brackets, tension members connecting the first mentioned brackets with the second mentioned brackets at points between the ends of the latter, compression members connecting the first mentioned brackets with the outer ends of the second mentioned brackets, and columns giving support to the supporting frame.

14. In combination with a furnace, a supporting frame exterior of the same, brackets connected with the furnace at intervals therearound and cooperating at their free ends with the frame in giving support to the furnace, bracing members connecting the free ends of the brackets together, and columns giving support to the supporting frame.

15. In combination with a furnace, a supporting frame exterior of the same, supporting b ackets connected to the furnace at intervals therearound and cooperating with the frame in giving support at their inner ends to the furnace, bracing members connecting the inner ends of said brackets to- .gether, and columns giving support to the supporting frame.

16. In combination with a furnace, a supporting frame exterior of the same, supporting brackets connected with the furnace and sustained by said frame, cant-aliver brackets connected with the supporting brackets and giving support to the furnace, and columns supporting said frame.

17 In combination with a furnace having a mantle-plate, a supporting frame exterior of the furnace, supporting brackets connected at intervals with the furnace and sustained from beneath by said supporting frame to give support to the mantle plate at intervals, connections between the brackets in position to support the mantle-plate at intervals between the brackets, and columns sustaining said supporting frame.

18. In combination with'a furnace, a polygonal supporting frame exterior of the same, I j

outwardly extending supporting members connected with the furnace at intervals therearound and sustained by the support ing frame, inwardly extending cantaliver brackets connected with said supporting members and giving support to the mantle of the furnace, and columns supporting said frame at the corners thereof.

In testimony whereof, I have affixed my signature in presence of two witnesses.

JOSEPH E. JOHNSON, JR. Witnesses WM; J. DOLAN, WV.- R. KENNEDY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0. 

